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SECTION 33 46 13
FOUNDATION DRAINAGE
SPEC WRITER NOTE:
if not applicable
any other item or
applicable in the
the paragraphs.
Delete between //---//
to project. Also delete
paragraph not
section and renumber
PART 1 - GENERAL
1.1 DESCRIPTION
This section specifies foundation drainage system, including
installation, backfill, and cleanout extensions, to place of connection
to storm sewer.
1.2 SUBMITTALS
A. Submit in accordance with Section 01 33 23, SHOP DRAWINGS, PRODUCT
DATA, AND SAMPLES.
B. Samples:
For each type of filter fabric, pipe, and fitting indicated
C. Product Data:
Certifications from the manufacturers attesting that
materials meet specification requirements.
1.3 RELATED WORK:
A. Materials testing and inspection during construction: Section 01 45 29,
TESTING LABORATORY SERVICES.
B. Safety requirements: Section 00 72 00, GENERAL CONDITIONS, Article,
ACCIDENT PREVENTION.
C. Protection of existing utilities, fire protection services, existing
equipment, roads, and pavements: Section 01 00 00, GENERAL
REQUIREMENTS.
D. Subsurface Investigation: Section 01 00 00, GENERAL REQUIREMENTS,
Article, PHYSICAL DATA.
1.4 APPLICABLE PUBLICATIONS
A. The publications listed below form a part of this specification to the
extent referenced. The publications are referred in the text by basic
designation only.
B. American Association of State Highway and Transportation Officials
(AASHTO):
HB17-02.................Standard Spec for Highway Bridges, Div II,
Section 36.4.2.4, Joint Properties.
M6-03...................Fine Aggregate for Portland Cement Concrete
M86/M86M-06.............Concrete Sewer, Storm Drain, and Culvert Pipe
M175/M175M-05...........Perforated Concrete Pipe
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M288-06.................Geotextile Specification for Highway
Applications
T281-06.................Vitrified Clay Pipe
C. American Society for Testing and Materials (ASTM):
A74-05..................Standard Specification for Cast Iron Soil Pipe
and Fittings
A746-03.................Standard Specification for Ductile Iron Gravity
Sewer Pipe
C14/C14M-05a ...........Standard Specification for Non-reinforced
Concrete Sewer, Storm Drain, and Culvert Pipe
C118/C118M-05a..........Standard Specification for Concrete Pipe for
Irrigation or Drainage
C443/C443M-05a..........Standard Specification for Joints for Concrete
Pipe and Manholes, Using Rubber Gaskets
C444/C444M-03...........Standard Specification for Perforated Concrete
Pipe
D448-03a................Standard Classification for Sizes of Aggregate
for Road and Bridge Construction
D2321-05................Standard Practice for Underground Installation
of Thermoplastic Pipe for Sewers and Other
Gravity-Flow Applications
D2729-03................Standard Specification for Poly(Vinyl Chloride)
(PVC) Sewer Pipe and Fittings
D2737-03................Standard Specification for Polyethylene (PE)
Plastic Tubing
D3034-06................Standard Specification for Type PSM Poly(Vinyl
Chloride) (PVC) Sewer Pipe and Fittings
D4216-03................Standard Specification for Rigid Poly (Vinyl
Chloride) (PVC) and Related PVC and Chlorinated
Poly (Vinyl Chloride) (CPVC) Building Products
Compounds
F477-02e1...............Standard Specification for Elastomeric Seals
(Gaskets) for Joining Plastic Pipe
F758-95(2000) ..........Standard Specification for Smooth-Wall Poly
(Vinyl Chloride)(PVC)Plastic Underdrain Systems
for Highway, Airport, and Similar Drainage.
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PART 2 - PRODUCTS
SPEC WRITER NOTE: Make material
requirements agree with applicable
requirements specified in the referenced
Applicable Publications. Update and
specify only that which applies to the
project.
2.1 MATERIALS
A. Underslab Header:
SPEC WRITER NOTE: Chose the material type
based on the design requirements
1. ASTM A74 or ASTM A746 cast-iron soil pipe and fittings in NPS 4 to
NPS 15 (DN 100 to DN 375). Joints shall be hub-and-spigot, gasket
type.
2. PE drainage tubing and fittings per ASTM D2737, in NPS 4 to NPS 10
(DN 100 to DN 250). Joints shall be coupling type.
3. PE pipe and fittings per ASTM D2737, in NPS 12 to NPS 36 (DN 300 to
DN 900). Joints shall be coupling type.
4. PVC sewer pipe and fittings per ASTM D3034, in NPS 4 to NPS 15
(DN 100 to DN 375). Joints shall be bell-and-spigot. ASTM F477,
elastomeric seal gaskets shall be used.
B. Perforated Drainage Pipe:
SPEC WRITER NOTE: Chose the material type
based on the design requirements.
1. Perforated, PE pipe and fittings per ASTM D2737, in NPS 4 to NPS 6
(DN 100 to DN 150). Joints shall be coupling type.
2. Perforated, PE pipe and fittings per ASTM D2737, in NPS 8 to NPS 24
(DN 200 to DN 600). Joints shall be coupling type.
3. Perforated, PVC sewer pipe and fittings per ASTM D2729, in NPS 4
(DN 100) only. Joints shall be bell-and-spigot, loose type.
4. Perforated, clay pipe and fittings per AASHTO T281 in NPS 3 to
NPS 24 (DN 80 to DN 600). Joints shall be socket-and-spigot, closed
type.
5. Perforated, concrete pipe and fittings per AASHTO M175/M175M,
standard strength or ASTM C444/C444M, Type 1, and applicable
requirements of ASTM C14/C14M, Class 2, in NPS 4 to NPS 24 (DN 100
to DN 600). Joints shall be socket-and-spigot type. ASTM C443/C443M
rubber gaskets shall be used.
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C. Cleanout Extension: ASTM A74, cast iron pipe or ASTM A746 ductile iron.
Gravity Sewer pipes shall have a neoprene gasket joints and long sweep
elbow fittings.
D. Drainage Conduit:
1. Pipe, fittings, and couplings shall be perforated and smooth PVC
complying with ASTM D4216 and ASTM D2729.
2. Pipe size shall be 200 mm (8 inches) and have a high minimum flow
rate equal to a NPS 4 (DN 100) pipe.
3. Fittings shall be PVC with NPS 4 (DN 100) outlet connection.
4. Couplings shall be PVC.
E. Geotextile: Nonwoven needle-punched geotextile, manufactured for
subsurface drainage, made from polyolefins or polyesters; with
elongation greater than 50 percent; complying with the following
properties determined according to AASHTO M 288:
F. Drainage Mat: Formed three dimensional polyethylene or high-impact
polymeric core or compression-resistant nylon matting of open threedimensional construction.
G. Drainage Material:
1. Bedding: Crushed stone, 20 mm (3/4 inch) to No. 4 per ASTM D448.
2. Fill to 300 mm (1 foot) above pipe: Crushed stone, 20 mm (3/4 inch)
to No. 4 per ASTM D448.
H. Concrete Sand: AASHTO M6.
PART 3 - EXECUTION
3.1 INSTALLATION
A. Laying: Prior to installation of bedding materials or piping,
examination of excavation and subgrades are to be observed by the
Resident Engineer. Invert elevation of drain pipe shall not be higher
than top of lowest floor elevation nor lower than a 45 degree line
projected from bottom of any adjacent footing. Lay drain lines and
firmly bed in granular material a minimum of 75 mm (3 inches) below
invert to top of pipe to true grades and alignment with bells facing
upgrade, and to slope uniformly between elevations shown on foundation
drainage drawings. Keep trenches dry until pipe is in place and
granular material backfill is completed to 300 mm (1 foot) above top of
pipe, unless otherwise noted.
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1. Install gaskets, seals, sleeves, and couplings according to
manufacturers written instructions and per the applicable standard:
a. PE and PVC pipe installation shall be per ASTM D2321 and ASTM
F758.
b. Concrete piping shall be per ASTM C14/C14M, AASHTO M86/M86M, and
ASTM C118/C118M.
c. PE joint construction shall be per ASTM D2737 and AASHTO HB17,
Division II, Section 26.4.2.4, “Joint Properties.”
d. PVC joint construction shall be per ASTM D3034 with elastomeric
seals gaskets per ASTM D2321.
e. Perforated PVC joint construction shall be per ASTM D2729, with
loose bell and spigot joints.
f. Perforated concrete joint construction, including fittings and
gaskets, shall be per ASTM C443/C443M.
2. Lay perforated pipe with perforations down. Lay plain end pipe with
closed joints held in place with two No. 9 spring steel wire clips
at each joint or by standard clay collars.
3. For foundation subdrainage, install piping pitched down in direction
of flow, at a minimum slope of 0.5 percent and with a minimum cover
of 900 mm (3 feet), unless otherwise indicated.
4. For underslab subdrainage, install piping pitched down in direction
of flow, at a minimum slope of 0.5 percent.
5. Install cleanout extensions where shown on the Contract Documents.
6. Prior to backfilling, check drain lines to assure free flow. Remove
obstructions and recheck lines until satisfactory.
B. Backfilling: Place a minimum of 300 mm (12 inches) of granular
material, hand tamped, extending in width a minimum of 600 mm (2 feet)
from building wall. Then place a minimum of 150 mm (6 inches) of
concrete sand, well tamped. Continue backfill with // concrete sand //
pit run sand and gravel with a maximum plasticity index of 6 //
drainage material from site excavation // to within 900 mm (3 feet) of
finished grade in planting areas. Remainder of backfill shall be
comparable to existing adjacent soils. In bituminous and concrete
paving areas, backfill to the bottom of the base course with pervious
material. Where foundation drain is within 600 mm (2 feet) of finished
grade, one-half of fill shall be made with crushed stone.
C. Filter fabric may be substituted for sand layer.
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D. Vertical drainage mat in conjunction with geotextile may be substituted
for sand and drainage material.
E. When drain lines are left open for connection to discharge line, the
open ends shall be temporarily closed and their location marked with
wooden stakes.
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